Book/Dissertation / PhD Thesis FZJ-2020-00464

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Studies of oxidation resistant tungsten alloys at temperatures of 1100 K to 1475 K



2019
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich
ISBN: 978-3-95806-444-7

Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Schriften des Forschungszentrums Jülich Reihe Energie & Umwelt / Energy & Environment 482, 158 S. () = Dissertation, Universität Bochum, 2019

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Abstract: Electricity from nuclear fusion is a promising approach. An accidental scenario of a fusion power plant assumes a loss of coolant and a damaged reactor vessel. In this case temperatures beyond 1200K of the plasma-facing materials are expected. This thesis investigates W-Cr-Y alloys to provide safety after such an accident. It is shown how Cr forms an oxide layer by diffusion that suppresses the release of WO$_{3}$ at temperatures up to 1273K in dry and humid air. Suppression by more than one order of magnitude as compared to W is measured for the first time. Y is issential for suppression of WO$_{3}$ release and is detected for the first time at the oxide grain boundaries and in the form of YCrO$_{3}$ nano-particles. An understanding of the oxidation in dependence on morphology, microstructure, composition and the envronmental conditions is developed using experimental and theoretical studies of the interaction of the involved elements.


Note: Dissertation, Universität Bochum, 2019

Contributing Institute(s):
  1. Plasmaphysik (IEK-4)
Research Program(s):
  1. 174 - Plasma-Wall-Interaction (POF3-174) (POF3-174)

Appears in the scientific report 2019
Database coverage:
Creative Commons Attribution CC BY 4.0 ; OpenAccess
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The record appears in these collections:
Document types > Theses > Ph.D. Theses
Institute Collections > IEK > IEK-4
Document types > Books > Books
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 Record created 2020-01-23, last modified 2022-09-30